Lubricating composition



Patented Apr. 4, 1939 2,153,121 LUBRICATING COMPOSITION John M. Musselman,

to The Standard Oil Company, Cleveland,

a corporation of Ohio No Drawing.

Cleveland, Ohio, assignor Ohio,

Application September 2, 1936,

Serial No. 99,093 4 Claims. (Cl. 8'l- --9) This invention relates to lubricating composiand more particularly mineral lubricating oils which are subject tohigh temperature usage; and it is among the objects of the invention to provide an oil which is especially durable under such usage, avoiding degradation such as ordinarily occurs with customary oils.

' To the accomplishment of the foregoing and related ends, the invention, then comprises the 10 features hereinafter fully described, and particularly pointed out in the claims, the following description setting forth in, detail certain illustrative embodiments of the invention, these being indicative however, of but a few of the various ways in which the principle of the invention may be employed.

I have found that mineral lubricating oils in conjunction with small amounts of such high molecular bases as the quinine group alkaloids,

have a remarkable durability against formation of polymers in high temperature usage, as for instance internal combustion engine service. These alkaloids are readily soluble in the oils. Very minute amounts produce the results noted.

The oil may be of desired viscosity, for instance a petroleum stock of 4''! to 200'Saybolt Universal at 210 F. ,The amount of the alkaloid may be 0.001 to 1.0 per cent. but relatively large amounts are in general needless.

Quinine, or other alkaloids of its group, being closely related chemically and properly affecting the present usage, 'may be employed, as cinchonine, cinchonidine, etc.

'as regards the details With a 300 red petroleum lu-. bricating oil of Saybolt Universal rat-210 I there is incorporated 0.01 per cent of quinine.

As another example: With a petroleum lubricating stock having a viscosity of 50 Saybolt Uni- 5 versal at 210 F. there is incorporated 0.01 per cent of cinchonine.

Other modes of applying the principle of the invention may be employed, change being made As an example:

features stated in any of the following claims, or the equivalent of such, be employed.

I therefore particularly point out and distictly claim as my invention:

1. A lubricating composition, consisting of a lo mineral oil of lubricating viscosity as a continuous menstruum and a small amount of an alkaloid oi the quinine grouptherein.

-2. A lubricating composition, mineral oil of lubricating viscosity as ous menstruum and a small amount therein.

3. A lubricating composition, mineral oil of lubricating viscosity consisting of a a continu- 20 of quinine consisting of a as a continuous menstruum and a small amount of cinchonine 25 therein.

4. A lubricating composition, consisting of a mineral oil of lubricating viscosity as a continuous menstruum and a small amount of cinchonidine therein.

JOHN M. MUSSELMAN.

described, provided the 10. 

